A false positive is still a failure

The register as a piece on a company bigging up their facial tracking software but I don't get these numbers, how can they claim to be such a success with 20% to 40% rate of false positives? A false positive is as much as a failure as a false negative. A false positive can actually be even more destructive than a false negative. Just ask the innocent teenager thrown prison for 12 days because his school didn't understand that if they want to match up calls to a call log both have to be set to the same time, not one an hour behind the other. Or the mother shouted at by
big brother CCTV, and then denigrated on national TV (how's that for an example of anti-social behaviour) for doing nothing. But then the government attitude has always been that we are all criminals and guilty of something, and if we are not then they will just keep pumping out new 'crimes' until we are, even dead people.